Espressif ESP-IDF up to 5.1.6/5.2.6/5.3.4/5.4.3/5.5.1 out-of-bounds

Summaryinfo

A vulnerability was found in Espressif ESP-IDF up to 5.1.6/5.2.6/5.3.4/5.4.3/5.5.1. It has been classified as problematic. This impacts an unknown function. Performing a manipulation results in out-of-bounds. This vulnerability is identified as CVE-2025-66409. The attack can be initiated remotely. There is not any exploit available. Upgrading the affected component is recommended.

Detailsinfo

A vulnerability, which was classified as critical, was found in Espressif ESP-IDF up to 5.1.6/5.2.6/5.3.4/5.4.3/5.5.1. This affects an unknown code block. The manipulation with an unknown input leads to a out-of-bounds vulnerability. CWE is classifying the issue as CWE-125. The product reads data past the end, or before the beginning, of the intended buffer. This is going to have an impact on confidentiality, integrity, and availability. The summary by CVE is:

ESF-IDF is the Espressif Internet of Things (IOT) Development Framework. In 5.5.1, 5.4.3, 5.3.4, 5.2.6, 5.1.6, and earlier, when AVRCP is enabled on ESP32, receiving a malformed VENDOR DEPENDENT command from a peer device can cause the Bluetooth stack to access memory before validating the command buffer length. This may lead to an out-of-bounds read, potentially exposing unintended memory content or causing unexpected behavior.

The advisory is shared at github.com. This vulnerability is uniquely identified as CVE-2025-66409 since 11/29/2025. The exploitability is told to be easy. It is possible to initiate the attack remotely. No form of authentication is needed for exploitation. Neither technical details nor an exploit are publicly available.

Upgrading eliminates this vulnerability.

If you want to get the best quality for vulnerability data then you always have to consider VulDB.

Productinfo

Vendor

• Espressif

Name

• ESP-IDF

Version

• 5.1.0
• 5.1.1
• 5.1.2
• 5.1.3
• 5.1.4
• 5.1.5
• 5.1.6
• 5.2.0
• 5.2.1
• 5.2.2
• 5.2.3
• 5.2.4
• 5.2.5
• 5.2.6
• 5.3.0
• 5.3.1
• 5.3.2
• 5.3.3
• 5.3.4
• 5.4.0
• 5.4.1
• 5.4.2
• 5.4.3
• 5.5.0
• 5.5.1

Website

• Product: https://github.com/espressif/esp-idf/

CPE 2.3info

• 🔒
• 🔒
• 🔒

CPE 2.2info

• 🔒
• 🔒
• 🔒

CVSSv4info

CVSSv3info

CVSSv2info

Exploitinginfo

Threat Intelligenceinfo

Countermeasuresinfo

Timelineinfo

Sourcesinfo

Entryinfo

If you want to get the best quality for vulnerability data then you always have to consider VulDB.

Discussion